Impossible to use modified teams in training arena

Hello, I bought the game on switch 2 and I like to modify a team and transfer all of my favorite players there, which means that I also remove almost all players that were in this club. 

The issue is that I wanted to play in practice arena until I realized that you can only play with the very default lineup (maybe also the subs). It means that if you transfer one of these players out of the club, he will disappear, as you can see on the image (the yellow player is the only playable left, the ones in orange or black are the transferred ones that you can't interact with but that you can spawn, and the blue ones are the opponents). If I remove the last playable player, there won't be any player on the pitch except the opponents.

Also, if I try to launch a training match with missing players, the game crashes.

I would love it to get fixed because it is my favorite gamemode and if I knew, I wouldn't have bought the game (you could use modified teams in previous games).